<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			let str = '随着自由贸易港建设进程的加快，海南在制度创新';
			let arr = str.split('自由');
			console.log(arr);
			let newstr = arr.join('<span>自由</span>');
			console.log(newstr);
		</script>
	</body>
</html>
